answer the door or should I
open it and say "AHA" again?
The Big Bang Theory Season 7, Episode 2
Aha! Good question.
The Big Bang Theory Season 5, Episode 17
Aha. There you go.
Breaking Bad Season 2, Episode 10
A-ha!
The Big Bang Theory Season 9, Episode 13
Aha.
The Big Bang Theory Season 1, Episode 12